ListView 的标准写法

MainActivity

public class MainActivity extends Activity {

    private ListView lv;
    private MyAdapter myAdapter;
    private List<News> list;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initData();
        processData();
    }

    /**
     * 找到对应的子控件
     */
    private void initView() {
        lv = (ListView) findViewById(R.id.lv);
    }

    /**
     * 模拟：请求服务器获取数据、解析数据的结果，即一个list集合
     */
    private void initData() {
        list = new ArrayList<News>();
        list.add(new News(R.drawable.iv1, "吉祥如意", "桃花潭水深千尺"));
        list.add(new News(R.drawable.iv2, "心想事成", "明月几时有"));
        list.add(new News(R.drawable.iv3, "国泰民安", "把酒问青天"));
        list.add(new News(R.drawable.iv4, "虎虎生威", "故人西辞黄鹤楼"));
        list.add(new News(R.drawable.iv5, "将进酒", "杯莫停，干了这杯酒"));
        list.add(new News(R.drawable.iv6, "恭喜发财", "锄禾日当午"));
        list.add(new News(R.drawable.iv7, "三字经", "今夕是何年"));
        list.add(new News(R.drawable.iv8, "陶渊明", "采菊东篱下"));
        list.add(new News(R.drawable.iv9, "田园诗人", "悠然见南山"));
        list.add(new News(R.drawable.iv10, "爱莲说", "往来无白丁"));
    }

    /**
     * 处理从服务器请求来的数据
     */
    private void processData() {
        myAdapter = new MyAdapter(getApplication(), list);
        lv.setAdapter(myAdapter);
    }

}

MyAdapter

public class MyAdapter extends BaseAdapter {
    private Context context;
    private List<News> list;

    MyAdapter(Context context, List list) {
        this.context = context;
        this.list = list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        // 把条目lv_item打气为view对象，减少findViewById的次数
        if (convertView == null) {
            convertView = View.inflate(context, R.layout.lv_item, null);

            holder = new ViewHolder();
            holder.iv = (ImageView) convertView.findViewById(R.id.iv);
            holder.title = (TextView) convertView.findViewById(R.id.title);
            holder.desc = (TextView) convertView.findViewById(R.id.desc);

            convertView.setTag(holder);
        } else {
            // 复用历史缓存view对象
            holder = (ViewHolder) convertView.getTag();
        }

        // 用list里对应对象的数据来填写对应的控件
        News news = list.get(position);
        holder.iv.setBackgroundResource(news.getImage());
        holder.title.setText(news.getTitle());
        holder.desc.setText(news.getDesc());
        return convertView;
    }

    /**
     * ViewHolder类用来管理item布局里的子控件
     */
    class ViewHolder {
        ImageView iv;
        TextView title;
        TextView desc;
    }
}

JavaBean

public class News {
    private int image;
    private String title;
    private String desc;


    public News(int image, String title, String desc) {
        super();
        this.image = image;
        this.title = title;
        this.desc = desc;
    }

    public int getImage() {
        return image;
    }

    public void setImage(int image) {
        this.image = image;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

}

布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.listview_demo.MainActivity" >

    <ListView
        android:id="@+id/lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>

</RelativeLayout>

item

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal" >

    <ImageView
        android:id="@+id/iv"
        android:layout_marginLeft="5dp"
        android:layout_width="140dp"
        android:layout_height="80dp"
        android:background="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/desc"
        android:textColor="@android:color/black"
        android:layout_marginLeft="5dp"
        android:layout_width="130dp"
        android:layout_height="wrap_content"
        android:layout_below="@id/iv"
        android:text="描述描述描述描述描述描述描述描述" />

    <TextView
        android:id="@+id/title"
        android:textColor="@android:color/black"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/desc"
        android:layout_alignParentRight="true"
        android:layout_marginRight="5dp"
        android:text="标题标题"
        android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

效果